Trailer light circuit for Mercedes-Benz GL-class X166 (2012-2016)

31/1 31/2 BLK/GRN WIRE BLK/RED WIRE BLK/WHT WIRE BRN WIRE BRN/RED WIRE CAN B H CAN B L COMPUTER DATA LINES SYSTEM ELECTRIC BRAKE CONTROL ELECTRICAL CONNECTOR FUSE 101 FUSE 115 FUSE 124 FUSE 128 FUSE 130 GRY/BLK WIRE GRY/YEL WIRE HOT AT ALL TIMES HOT W/ CIRCUIT 15 RELAY ENERGIZED HOT W/ CIRCUIT 30 RELAY ENERGIZED REAR FUSE BOX RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RFL (+) SAM CONTROL UNIT TRAILER RECOGNITION CONTROL UNIT TRAILER SOCKET (CENTER OF REAR BUMPER) YEL/BLK WIRE YEL/RED WIRE